﻿204 PROCEEDINGS OF THE NATIONAL IMUSEUM vol. 102 



and 1896 came from this locality, though most of his localities are 

 rather vague, owing to the absence of cultural landmarks. 



48FR75. An area of badlands centering around the corners of sees. 

 2, 3, 10, and 11, T. 4 N., R. 5 E., of the Wind Eiver meridian on the 

 south side of Cottonwood (Dry Muddy) Creek about 7 miles above 

 the mouth. The sediments here consist of drab greenish-gray shaly 

 clays, which are highly gypsiferous throughout. Yellowish channel 

 sandstones play an important role in the physical features. Fossils 

 are rare in this area and are often so badly rotted with gypsum that 

 they are not worth collecting. 



48FR76. SW14 sec. 5, T. 89 N., R. 94 W., of the 6th principal merid- 

 ian, on the east side of the Big Horn River and on the north side of 

 Birdseye Creek. A small area of banded red and greenish clays with 

 local concretionary zones. These banded beds grade laterally into the 

 drab gray clays. This locality is one of the most productive in 

 quantity and variety of fossils. 



48FR77. NW14 sec. 1 and NE14 sec. 2, T. 4 N., R. 5 E., of the Wind 

 River meridian, on the north side of Cottonwood (Dry Muddy) Creek 

 about 4 miles above the mouth. A small area of banded red and 

 greenish clays with considerable gypsum, and local nodular zones. 

 Crossbedded channel sandstones make up a greater part of the sedi- 

 ments here than in any of the other localities. Fossils are rare in this 

 locality and are usually rather badly damaged by gypsum. 



48FR78. NE14NW14 sec. 32, T. 5 N., R. 6 E., of the Wind River 

 meridian on the north side of Cottonwood (Dry Muddy) Creek near 

 the mouth. A rather large area of banded red and greenish clays 

 with considerable gypsum, and local nodular zones. The fossils 

 were associated with the latter and were usually rather well pre- 

 served, though fragmentary. Fossils are scarce in this area and 

 only a small fauna was obtained. 



48FR79. SW14 sec. 29, T. 5 N., R. 6 E., of Wind River meridian. 

 On the west side of Big Horn River about 1 mile north of Cotton- 

 wood (Dry Muddy) Creek, north of a fault of unknown displacement 

 which extends across this area about 2 miles south of the mountains. 

 A small area of banded red, yellow, and greenish sandy clay with 

 abundant small calcareous nodules. The only fossils obtained from 

 this locality were broken mammal teeth and fresh-water gastropods. 



48FR80. SW14 sec. 2, T. 4 N., R. 4 E., of Wind River meridian, 

 south side of Cottonwood (Dry Muddy) Creek about 14 miles above 

 the mouth, west side of trail which crosses creek. A small area of 

 banded red and greenish clays with local nodular zones. Channel 

 sandstones are prominent in the upper portion of the exposures. 



Figure 80. — Map of Boysen Reservoir area showing localities from which vertebrates were 



obtained. 



